Reliable M336 K33.6 ESFR Pendent Fire Sprinkler

Protect high-density warehousing configurations with the Reliable Model M336 Early Suppression Fast Response (ESFR) pendent sprinkler. Engineered for high-challenge storage fire protection in wet pipe suppression systems, this heavy-duty component rapidly detects and suppresses fires to meet strict commercial facility requirements.

This sprinkler satisfies stringent FM Global storage criteria and operates in accordance with FM Data Sheets 2-0 and 8-9. Contractors rely on its precise hydraulic performance to meet designated commodity and storage standards enforced by the authority having jurisdiction (AHJ).

Key Features & Construction

• High-Capacity K-Factor: Delivers a nominal K-33.6 (480 metric) flow rate to ensure rapid fire suppression in demanding storage environments.
• Durable Construction: Built with a robust brass-alloy frame, bronze-alloy cap and deflector, and nickel-alloy components to withstand industrial facility conditions.
• Reliable Thermal Response: Utilizes a levered fusible-alloy solder link available in ordinary (165°F / 74°C) and intermediate (212°F / 100°C) temperature ratings.
• PTFE Sealing Assembly: Prevents sticking and ensures dependable valve operation over extended service intervals.
• Flexible Connection Options: Configured for 1¼-inch NPT, ISO 7-R1¼ (BSPT) threads, or a 1¼-inch AWWA C606 grooved connection.

Technical Specifications & Compliance Table

Always verify local authority having jurisdiction (AHJ) mandates and match the full ordering reference, connection standard, temperature rating, and sprinkler markings before job-site installation. Threaded models require the Reliable Model W17 sprinkler wrench, while grooved units must utilize couplings installed per the manufacturer's instructions.

Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)